Rest

Data time: 4/30/2026 5:00 AM ET

Monitoring Site

Location
Address:	Frederick Co. Public School Maintenance Dept.
Latitude:	39.28101
Longitude:	-78.08157
Region:	Valley

Air Quality Information
Pollutant	Concentration	Units of Measure
Ozone	15	PPB
PM10	9	UG/M3
PM2.5	5.1	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
05:00	14	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
05:00	8	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
05:00	28	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
04:00	17	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	8	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	27	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	21	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	9	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
03:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
02:00	21	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
02:00	9	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
02:00	20	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
01:00	17	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
01:00	10	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
01:00	18	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
00:00	18	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
00:00	10	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.